Bad sound quality with ReSpeaker Mic Array v2.0

[solidssss]

I'm sorry but I did not know just how bad the audio output sounds with 16khz though the 3.5mm. If I had known before I bought it, I'd return it.
It just sound completely awful listening to music with the respeaker. Is there someway to fix this issue?

I've flashed the firmware file 48k_1_channel_firmware_6.02dB.bin and 48k_6_channels_firmware_6.02dB.bin but there was no difference on the audio output quality. I've re-flashed multiple times.

My cat /proc/asound/ArrayUAC10/stream0 (it says 48 khz but plays 16khz sound):
SEEED ReSpeaker 4 Mic Array (UAC1.0) at usb-0000:01:00.0-1.1, full speed : USB Audio

Playback:
Status: Stop
Interface 1
Altset 1
Format: S24_3LE
Channels: 2
Endpoint: 1 OUT (ASYNC)
Rates: 48000, 48000, 48000
Bits: 24
Channel map: FL FR

Capture:
Status: Stop
Interface 2
Altset 1
Format: S16_LE
Channels: 6
Endpoint: 2 IN (ASYNC)
Rates: 48000, 48000, 48000
Bits: 16
Channel map: FL FR FC LFE SL SR